Temperature on the Specific Heat of Aniline. 11 



The following simple formula gives the specific-heat curve 



with sufficient accuracy: — 



S l = O-5156 + (0 1 -2O)xK)OO4+(0 1 -2O) 2 x -000002. (A) 

 The following table gives the experimental results and 



those obtained from the above formula. 



Table VII. 



9 V 



(Experimental Results) . 



Si 



(from formula A). 



•5137 



o 

 15 



•5137 



20 



•5155 



•5156 



25 



•5175 



•5176 



30 



•5198 



•5198 



35 



•5221 



•5221 



40 



•5244 



•5244 



45 



•5268 



•5269 



50 



•5294 



•5294 



52 



•5304 



•5305 



I have made a careful search for records of previous deter- 

 minations, but I have been unable to find any in addition to 

 those given in Landolt and Bornstein's tables— which are as 



follows : — 



Temp. S r Observer. 



8° to 82° -5120 Schiff. 



12° to 138° -5231 „ 



12° to 150° '464: Petit. 



Note (Sept. 6, 1894). — Having unfortunately strained one 

 of the leads when the tank was at a high temperature, the 

 insulation between the coil and the steel chamber commenced 

 to fall off on Sept. 1st. I have therefore most reluctantly 

 been compelled to take the whole apparatus to pieces, in order 

 to replace the ebonite insulators. On Sept. 3rd 1 withdrew 

 the whole of the aniline, and on examining it I found that 

 in colour it had darkened considerably. The experiments 

 described in this paper were completed on Aug. 3rd and 

 on Aug. 16th the apparatus was again set going, and 

 was kept continually at work until Sept. 3rd. During this 

 time electrical currents were continually passing through the 

 coil and the stirrer must have made some millions of revolu- 

 tions. The nature of the experiments that I was then engaged 

 upon compelled close attention to the capacity for heat of the 

 aniline, and I am convinced that even a small change in the 

 specific heat could not have escaped my notice. It would 

 appear, therefore, that the change indicated by this darkening 

 was not of a nature to sensibly affect the specific heat. 



[An additional Note will be found among the Miscellaneous 

 Articles in the present Number.] 



